Behind closed doors
What goes on behind closed doors might be an open book for those with the right tools.
A sneaky peek of your company might need only go as far as infiltrating your mailroom. At about $20 a can, X-Ray Spray will let you see what's inside an envelope by making it temporarily translucent. Once dry, it leaves no trace of snooping.
Every picture tells a story, but perhaps not always as effectively as sound.
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Someone intent on hearing your innermost secrets, stealing your privileged business information or trying to catch the milkman crawling through the bedroom window can use such devices as Detect Ear, a device that allows you to listen to sounds up to 300 yards away.
There is also that old-fashioned standby of bugging a room by placing a recording device inside a telephone handset or stashing a transmitter the same way a camera might be concealed.
The world of corporate espionage is also leading some -- perhaps as much out of paranoia as to protect trade secrets -- to take on a bit of countersurveillance.
The CPM-700, for example, is a broadband receiver designed to detect and find all major types of electronic surveillance devices including room, phone, body bugs, video transmitters and tape recorders. It's everything needed to perform a professional sweep and fits inside a standard briefcase.
The Personal RF Detector, which costs between $500 and $600, is a handheld model for finding transmitters or bugging devices in a room or automobile.
More expensive, advanced bug sweepers come with jamming technology to prevent conversations from being heard clearly.